How to Hide Ivory Search Admin Menus

function plt_hide_add_search_to_menu_menus() {
	//Hide "Ivory Search".
	remove_menu_page('ivory-search');
	//Hide "Ivory Search → Search Forms".
	remove_submenu_page('ivory-search', 'ivory-search');
	//Hide "Ivory Search → Menu Search".
	remove_submenu_page('ivory-search', 'ivory-search-settings&tab=menu-search');
	//Hide "Ivory Search → Settings".
	remove_submenu_page('ivory-search', 'ivory-search-settings');
	//Hide "Ivory Search → Contact Us".
	remove_submenu_page('ivory-search', 'ivory-search-contact');
	//Hide "Ivory Search → Upgrade".
	remove_submenu_page('ivory-search', 'ivory-search-pricing');
}

add_action('admin_menu', 'plt_hide_add_search_to_menu_menus', 1000000000);
Where do I put this code?